Error when Opening Project in version 4.1

Since switching to ASPRunnerPro 4.1 (Build 164) I seem to be having problems re-opening projects I have saved.
I've built a project using a SQL ODBC with the following details

Data Source Name: RCDB on eESM

Data Source Description: RCDB on eESM

Database: eESMmaster
I successfuly built the site, and saved it. Now, when I try to re-open the project I get this error:
SQL Error State:42000, Native Error Code: FDC, ODBC Error: [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot open database requested in login 'eESMmasterDSN=RCDB on eESM'. Login fails.
I click OK, then get this very long error that shows:

Error connecting to database:

DSN=RCDB on eESM;UID-rcdbuser;PWD=rcdbuser123DNS=RCDB on eESM;Description-RCDB on eESM;UID-rcdbuser;PWD=rcdbuser123;APP=AspRunner Professional Application;WSID=RCONBK52937;DATABASE=eESMmasterDSN=RCDB on eESM;Description=RCDB on eESM;UID=rcdbuser;PWD=rcdbuser123;APP=AspRunner Professional Application;WSID=RCONBK52937;DATABASE=eESMmaster
Not a SQL guru, but noticed that the Database= string and the DSN= string are not seperated by a ";" (i.e. DATABASE=eESMmasterDSN=RCDB on eESM)...Does that matter?
I have not changed my ODBC connection in anyway, and verifyed/tested that it connects as is. Basicly, nothing has changed between the time I saved the project and the time I re-opened it.
Unfortunatly, If I point it back to the same ODBC connection, I loose all of the work I have done. I tried to rebuild it and save it again, but the same thing happens. It is also happening on another site I build using a different ODBC connection/database.